Diamond dotted insulation paper(D.D.P) is made of electrical insulating paper with diamond –shape epoxy resin dotted in both sides. This product has good dielectric property and good mechanical property after being heat-solidification.
It can be used as insulation material for coils and between layers of oil immerged power and distribution transformers.
It is a kind of material with inertia , dry and no conglutination at normal temperature (below 30 degree C). The Diamond Dotted paper will make the electric conductor forever felt up as a hard unit under the high temperature by its internal latency substance. When the temperature is rising up to 90 degree C, The diamond dotted paper begins one-off thaw and then one-off solidification. When to keep the temperature at 90 degree C for 90 minutes , the epoxy resin would paste on neighboring cable and paper safely.Thickness: 0.08, 0.13, 0.18,0.20, 0.25mm,products through ISO 9001.UL,SGS certification.competitive quote in china.
| Item | Index. | Unit | Value | |||||
| 1 | Thickness and tolerance | mm | 0.08±0.005 | 0.13±0.007 | 0.18±0.01 | 0.20±0.010 | 0.25±0.010 | |
| 2 | Density | g/cm3 | 0.85～1.10 | |||||
| 3 | Single thickness | μm | 10～15 | |||||
| 4 | Moisture content | % | 4.0～8.0 | |||||
| 5 | Oil-absorption | % | ≥20 | |||||
| 6 | Bond strength | at room temp. | kPa | ≥650 | ||||
| 100℃±2℃ | ≥400 | |||||||
| 7 | Pollution for transformer oil | - | no pollution(△tan∮＜0.001) | |||||
| 8 | Tensile Strength | lengthwise | N/10mm | ≥60 | ≥110 | ≥160 | ≥180 | ≥230 |
| crosswise | ≥30 | ≥50 | ≥70 | ≥80 | ≥100 | |||
| 9 | Tearing Strength | lengthwise | Mn | ≥450 | ≥900 | ≥1350 | ≥1500 | ≥2000 |
| crosswise | ≥500 | ≥1000 | ≥1500 | ≥1700 | ≥2300 | |||
| 10 | Breakdown voltage | in air | KV | ≥0.88 | ≥1.37 | ≥2.00 | ≥2.10 | ≥2.25 |
| in oil | ≥4.40 | ≥7.00 | ≥9.00 | ≥9.80 | ≥11.50 | |||
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